中文摘要：

为构建适合于长江流域机械化采收的麦茬直播棉群体,以特早熟品种国欣早11-1为材料,于2011—2012年进行密度与化控(喷施生长调节剂棉太金)试验,结果表明:在1 hm290 000~105 000株,苗期、盛蕾期、盛花期、盛铃期分别使用生长调节剂棉太金90 ml/hm2、180 ml/hm2、360 ml/hm2、540 ml/hm2条件下,籽棉产量高达3 551.3 kg/hm2以上。且在1 hm290 000株密度下,苗期使用生长调节剂棉太金90 ml/hm2,盛蕾期使用棉太金180ml/hm2,盛花期使用棉太金360 ml/hm2,盛铃期使用棉太金540 ml/hm2,株高(105.4cm)、果枝始节位高度(26.1cm)、果枝长度(17.4 cm)和单株果枝数(10.5台)等符合机械化采收对棉花株型要求。且在此处理下,棉株功能叶叶绿素含量较高,能实现于8月16日—9月20日集中成铃。

英文摘要：

To develop a direct seeded cotton population after wheat harvested by mechanical plucking in the Yangtze River basin,cultivar Guoxinzao11?1 was studied for optimum planting density and growth regulator ( Miantaijin) application scheme in 2011-2012 cotton seasons.The results showed that the seed cotton yield was more than 3 551?3 kg/hm2 when planting density was 90 000-105 000 plants per hectare and Miantaijin rates were 90 ml/hm2 ,180 ml/hm2 ,360 ml/hm2 , 540 ml/hm2 at seedling stage,bud peaking stage,full?blossom stage and boll peaking stage,respectively. Under the planting density of 90 000 plants per hectare, Miantajin applied at 90 ml/hm2 at seedling stage, 180 ml/hm2 at bud peaking stage, 360 ml/hm2 at full?blossom stage, and 540 ml/hm2 at boll peaking stage drove the plant height, the height of first fruiting branch, the length of fruiting branch and the num?ber of fruiting branch per plant fit the plant shape requiried by mechanical plucking. Besides, the chlorophyll contents was high, and cotton fruiting could be achieved in a short period of time from Aug. 16 to Sep. 20.